<template>
  <div class="login" :style="backgroundStyle">
    <div class="vegas-overlay" />
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">两癌筛查管理系统</h3>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          auto-complete="off"
          placeholder="账号"
        >
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item v-if="captchaEnabled" prop="code">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" class="login-code-img" @click="getCode">
        </div>
      </el-form-item>
      <el-checkbox v-if="false" v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;"
          @click.native.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
<!--        <div style="float: right;">-->
<!--          <router-link class="link-type" :to="'/register'">立即注册</router-link>-->
<!--        </div>-->
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2022-2023 两癌筛查系统 All Rights Reserved.</span>
    </div>
  </div>
</template>
<script>

export default {
  name: 'Login',
  data() {
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码不能少于6位'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: '',
        rememberMe: false
      },
      loginRules: {
        username: [
          { required: true, trigger: 'blur', message: '请输入用户名' },
          { min: 4, max: 20, message: '请输入 4 到 20 个字符的用户名', trigger: 'blur' }
        ],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      captchaEnabled: false,
      currentIndex: 0,
      backgroundImageUrl: require('@/assets/images/party.1039.jpg')
    }
  },
  computed: {
    backgroundStyle() {
      return {
        'background-image': `url(${this.backgroundImageUrl})`
      }
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  mounted() {
    // setInterval(() => {
    //   // 定义要切换的背景图片，双引号里面，可以放任意多个
    //   const images = [
    //     require('@/assets/images/party.1037.jpg'),
    //     require('@/assets/images/party.1038.jpg'),
    //     require('@/assets/images/party.1039.jpg'),
    //     require('@/assets/images/party.1041.jpg'),
    //     require('@/assets/images/party.1040.jpg')
    //   ]
    //   if (this.currentIndex >= images.length) {
    //     this.currentIndex = 0
    //   }
    //   this.backgroundImageUrl = images[this.currentIndex]
    //   this.currentIndex += 1
    //   console.log('backgroundImageUrl', this.backgroundImageUrl)
    // }, 5000)
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  //background-image: url("../../assets/images/login-bg.jpg");
  background-size: cover;
}
.vegas-overlay {
  opacity: 0.2;
  margin: 0px;
  padding: 0px;
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  background-image: url(../../assets/images/overlay.png);
  z-index: 0;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  z-index: 1;
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 38px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 38px;
}
</style>
